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Chapter 2: Q41E (page 124)

Use the periodic table to give the name and symbol for each of the following elements:

(a) The Nobel gas in the same period as Germanium.

(b) The Alkaline earth metal in the same period as selenium.

(c) The Halogen in the same period as lithium.

(d) The Chalcogen in the same period as cadmium.

Short Answer

Expert verified

(a)Krypton . 83Kr36

(b)Calcium . 40Ca20

(c) Fluorine . 19F9

(d)Tellurium . 127Te52

Step by step solution

01

Use the periodic table to find the periods of the given elements.

(a) Germanium belongs to the fourth period. The nobel gas in that period is Kr.

(b) Selenium belongs to the fourth period. The alkaline earth metal of that period is Ca.

(c) Lithium belongs to the second period. The halogen in that period is F.

(d) Cadmium belongs to the fifth period. The chalcogen of that period is Te

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Most popular questions from this chapter

Predict and test the behavior of α particles fired at a “plum pudding” model atom.

(a) Predict the paths taken by α particles that are fired at atoms with a Thomson’s plum pudding model structure. Explain why you expect the α particles to take these paths.

(b) If α particles of higher energy than those in (a) are fired at plum pudding atoms, predict how their paths will differ from the lower-energy α particle paths. Explain your reasoning.

(c) Now test your predictions from (a) and (b). Open the Rutherford Scattering simulation (http://openstaxcollege.org/l/16PhetScatter) and select the “Plum Pudding Atom” tab. Set “Alpha Particles Energy” to “min,” and select “show traces.” Click on the gun to start firing α particles. Does this match your prediction from (a)? If not, explain why the actual path would be that shown in the simulation. Hit the pause button, or “Reset All.” Set “Alpha Particles Energy” to “max,” and start firing α particles. Does this match your prediction from (b)? If not, explain the effect of increased energy on the actual paths as shown in the simulation.

Use the periodic table to give the name and symbol for each of the following elements:

(a) the halogen in the same period as the alkali metal with 11 protons

(b) the alkaline earth metal in the same period with the neutral noble gas with 18 electrons

(c) the noble gas in the same row as an isotope with 30 neutrons and 25 protons

(d) the noble gas in the same period as gold

Write a symbol for each of the following neutral isotopes. Include the atomic number and mass number for each.

(a) the alkali metal with 11 protons and a mass number of 23

(b) the noble gas element with 75 neutrons in its nucleus and 54 electrons in the neutral atom

(c) the isotope with 33 protons and 40 neutrons in its nucleus

(d) the alkaline earth metal with 88 electrons and 138 neutrons

Write a symbol for each of the following neutral isotopes. Include the atomic number and mass number for each.(a) the chalcogen with a mass number of \({\bf{125}}\)(b) the halogen whose longest-lived isotope is radioactive(c) the noble gas, used in lighting, with \({\bf{10}}\) electrons and \({\bf{10}}\) neutrons(d) the lightest alkali metal with three neutrons

Give the number of protons, electrons, and neutrons in neutral atoms of each of the following isotopes:\(\begin{aligned}{}\left( a \right){\rm{ }}{}_3^7Li{\rm{ }}\\\left( b \right){\rm{ }}{}_{52}^{125}Te{\rm{ }}\\\left( c \right){\rm{ }}{}_{47}^{109}Ag{\rm{ }}\\\left( d \right){\rm{ }}{}_7^{15}N{\rm{ }}\\\left( e \right){\rm{ }}{}_{15}^{31}P\end{aligned}\)
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